* [http://www.building-engineering.de HVAC Tool] - you can try it as demo version without constrain but you are limited by exporting cases

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* [http://www.building-engineering.de/index.php?option=com_jdownloads&view=viewcategories&Itemid=127&lang=de HVAC Tool] - you can try it as demo version without constrain but you are limited by exporting cases